﻿using System;
using System.Collections.Generic;
using System.Windows.Data;
using System.Globalization;

namespace BillsWpf
{
    /// <summary>
    /// Used by a calendar control to determine the font weight of the date text
    /// </summary>
    public class WeightConverter : IValueConverter
    {
        /// <summary>
        /// Gets or sets the bolded dates.
        /// </summary>
        /// <value>The bolded dates.</value>
        public static IList<DateTime> BoldedDates { get; set; }

        /// <summary>
        /// Converts a value.
        /// </summary>
        /// <param name="value">The value produced by the binding source.</param>
        /// <param name="targetType">The type of the binding target property.</param>
        /// <param name="parameter">The converter parameter to use.</param>
        /// <param name="culture">The culture to use in the converter.</param>
        /// <returns>
        /// A converted value. If the method returns null, the valid null value is used.
        /// </returns>
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            string result = "Normal";
            DateTime date = (DateTime)value;
            if (BoldedDates != null && BoldedDates.Contains(date))
            {
                result = "Bold";
            }

            return result;
        }

        /// <summary>
        /// Converts a value.
        /// </summary>
        /// <param name="value">The value that is produced by the binding target.</param>
        /// <param name="targetType">The type to convert to.</param>
        /// <param name="parameter">The converter parameter to use.</param>
        /// <param name="culture">The culture to use in the converter.</param>
        /// <returns>
        /// A converted value. If the method returns null, the valid null value is used.
        /// </returns>
        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            return null;
        }
    }
}